COPENHAGEN, DENMARK - APRIL 16: Queen Margrethe of Denmark, Crown Princess Mary of Denmark, Prince Christian of Denmark, Princess Isabella of Denmark, Prince Vincent of Denmark, Princess Josephine, Prince Joachim of Denmark, Princess Marie of Denmark, Prince Nikolai of Denmark, Prince Felix of Denmark, Prince Henrik of Denmark and Princess Athena of Denmark pose on the balcony of Amalienborg palace during the Danish Queen's 78th Birthday celebrations on April 16, 2018 in Copenhagen, Denmark.  (Photo by Patrick van Katwijk/Getty Images)